> ## Documentation Index
> Fetch the complete documentation index at: https://superdoc-caio-pizzol-docs-ai-core-preset.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication

Bearer tokens. Every request needs one.

```bash theme={null}
Authorization: Bearer sd_sk_abc123xyz789
```

[Get Your Key - Takes 2 minutes](/api-reference/quickstart)

## Production setup

<Warning>
  Client-side JavaScript? Stop. Keys belong in environment variables.
</Warning>

```bash theme={null}
# .env
SUPERDOC_API_KEY=sd_sk_production_key

# Your backend
const apiKey = process.env.SUPERDOC_API_KEY
```

Different keys for dev and production. Rotate quarterly.